Can I close the lid while updating?

My fiancee got a 3DS yesterday, and a $20 eShop card. However, we have really bad (satellite) internet, and the system is taking forever to update. Is it possible to close the lid, and it would still be updating in the background? I'm a little worried that it will get burn-in if I leave it open the whole time.---"I have an ongoing battle in arcades against AAA. I don't know who he is or how his skills are so widespread, but I've vowed to defeat him." - JakaIDX